Abstract
All optical measurement methods base on the image analysis and relation between the measured parameter and some image features. In Digital Particle Image Thermometry (DPIT), such relation represents a function between the temperature and particles’ colour (i.a. Thermochromic Liquid Crystals). For the quantitative data acquisition the “colour” information is necessary, therefore the colour spaces based on hue H are used. Due to the big number of numerical operations needed in the analysis, the choice of colour space transformation is significant due to the accuracy and computational time. In this paper commonly applied RGB to HSI colour spaces’ transformations were compared and evaluation of their suitability to temperature measurement was performed. Time of obtaining the final results was considered as the main criterion. Appropriate calculations were conducted and presented.
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